6538866481 has 8 divisors (see below), whose sum is σ = 7578244224. Its totient is φ = 5525802240.

The previous prime is 6538866461. The next prime is 6538866491. The reversal of 6538866481 is 1846688356.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6538866481 - 2⁷ = 6538866353 is a prime.

It is a super-2 number, since 2×6538866481² = 85513549712690646722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6538866421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6577840 + ... + 6578833.

It is an arithmetic number, because the mean of its divisors is an integer number (947280528).

Almost surely, 2^6538866481 is an apocalyptic number.

It is an amenable number.

6538866481 is a deficient number, since it is larger than the sum of its proper divisors (1039377743).

6538866481 is a wasteful number, since it uses less digits than its factorization.

6538866481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13156751.

The product of its digits is 6635520, while the sum is 55.

The square root of 6538866481 is about 80863.2579173014. The cubic root of 6538866481 is about 1869.9679216094.

The spelling of 6538866481 in words is "six billion, five hundred thirty-eight million, eight hundred sixty-six thousand, four hundred eighty-one".